package com.lovo.bean;

interface A{

}
class Person{
    String s;
}
public class StudentBean extends Person implements A {
    static {

    }
    {

    }
    public StudentBean(){
        super.toString();
        this.clone();
    }
    protected Object clone(){
//        System.out.println("studentbean");
        return null;
    }
    public String toString(){
        return "学生对象";
    }
    private String s;
    public static void main(String[] args) {
        StudentBean o = new StudentBean();
        System.out.println(o instanceof  A);
        System.out.println(o.s instanceof String);
        System.out.println(null == null);

//        String s;
//        System.out.println("s=" + s);
//        System.out.println(o.s.equals(""));
//        String str = null;
//        System.out.println(str.toString());

        System.out.println(o);
        int [] ary = {1,2,3};
        System.out.println(ary);

        char [] cs = {'h','l'};
        System.out.println(cs);
    }

}
